JPH08949A - Gas blowing device - Google Patents

Gas blowing device

Info

Publication number
JPH08949A
JPH08949A JP6135440A JP13544094A JPH08949A JP H08949 A JPH08949 A JP H08949A JP 6135440 A JP6135440 A JP 6135440A JP 13544094 A JP13544094 A JP 13544094A JP H08949 A JPH08949 A JP H08949A
Authority
JP
Japan
Prior art keywords
gas
liquid
air
stirring blade
blown
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6135440A
Other languages
Japanese (ja)
Other versions
JP3381389B2 (en
Inventor
Tadayoshi Tamaru
Tetsuya Watanabe
哲也 渡辺
忠義 田丸
Original Assignee
Ishikawajima Harima Heavy Ind Co Ltd
石川島播磨重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ishikawajima Harima Heavy Ind Co Ltd, 石川島播磨重工業株式会社 filed Critical Ishikawajima Harima Heavy Ind Co Ltd
Priority to JP13544094A priority Critical patent/JP3381389B2/en
Publication of JPH08949A publication Critical patent/JPH08949A/en
Application granted granted Critical
Publication of JP3381389B2 publication Critical patent/JP3381389B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To make minute the foams of a gas blown into liquid without generating cavitation when a large volume of gas is blown in by forming a gas exhaust outlet vertically and downwardly on the discharge side of a side face type agitation blade set in liquid rotatably. CONSTITUTION:A propeller-shaped side face type agitation blade 8 for generating and agitating discharge flow out of absorbing solution in a liquid storage tank 4 is set rotatably in the vicinity of side wall in the absorbing solution in the tank 4 of an absorption tower 1. An air blowing pipe 12 is connected with the liquid storage tank 4, and the air blowing pipe 12 is extended to the front of the agitation blade 8 in the absorbing solution, and its front section is of a straight pipe shape vertically and downwardly on an extension line of a rotating shaft of the agitation blade 8, and an air plenum 13 for blowing air vertically and downwardly is formed on an end section. As the air is blown into the discharge side of the agitation blade 8 as above, foams are made minute without generating cavitations when a large volume of gas is blown in.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は液体に気体を吹き込む気
体吹込装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas blowing device for blowing a gas into a liquid.

【0002】[0002]

【従来の技術】気体吹込装置は、液体中に気体を吹き込
ませるもので、例えば燃焼機器からの排ガスを脱硫処理
する湿式の排煙脱硫装置に備えられている。
2. Description of the Related Art A gas blowing device blows gas into a liquid and is provided in, for example, a wet flue gas desulfurization device for desulfurizing exhaust gas from a combustion device.

【0003】湿式の排煙脱硫装置は、吸収塔内で排ガス
と吸収剤例えば炭酸カルシウムを含むスラリ状の吸収液
とを接触させ、ガス中の硫黄酸化物を吸収剤に吸収させ
て排ガスの脱硫処理を行うものであり、その硫黄酸化物
を吸収した吸収剤を石こうとして回収するために脱硫処
理後の吸収液を酸化処理する場合に気体吹込装置が用い
られている。この気体吹込装置は、脱硫処理後の吸収液
中に空気の吹込管を複数配設して、その吹込管の吹出口
から空気を吸収液中に吹き込ませるパイプ吹込式のもの
と、脱硫処理後の吸収液を撹拌する側面式撹拌機の翼の
吸込側に空気を噴出させるもの(特公平 4-69089号公報
等)とがあり、これにより吸収液と空気中の酸素とが反
応して石こうが析出する。
In a wet flue gas desulfurization apparatus, exhaust gas is desulfurized by bringing the exhaust gas and an absorbent such as a slurry-like absorbent containing calcium carbonate into contact with each other in the absorption tower to absorb the sulfur oxide in the gas into the absorbent. A gas blowing device is used when oxidizing the absorbent after desulfurization in order to recover the absorbent that has absorbed the sulfur oxides as gypsum. This gas blowing device is provided with a plurality of air blowing pipes in the absorbing liquid after desulfurization treatment, and a pipe blowing type in which air is blown into the absorbing liquid from the outlet of the blowing pipe, and after the desulfurization treatment. There is a side-type agitator that stirs the absorbing liquid of the above type, in which air is jetted to the suction side of the blade (Japanese Patent Publication No. 4-69089 etc.), which causes the absorbing liquid to react with oxygen in the air to produce gypsum. Is deposited.

【0004】[0004]

【発明が解決しようとする課題】ところで、上述の気体
吹込装置では、前者は液体中に配設した複数の吹込管の
吹出口から気体を液体中に単に吹き込ませるため、特に
大容量の気体を吹き込ませる場合には気泡が大きくな
り、気泡を微細にして吹き込ませることができず、吸収
液の酸化効率が悪くなる。後者では、翼の吸込側に気体
を噴出させて翼で空気を分解して微細な気泡にしている
ため、その気体の吹込量を増やすとキャビテーションを
起し易くなるので気体吹込量を多くすることができな
い。
By the way, in the above-described gas blowing device, the former simply blows the gas into the liquid from the outlets of the plurality of blowing pipes arranged in the liquid, so that a particularly large volume of gas is supplied. When the bubbles are blown in, the bubbles become large, the bubbles cannot be made fine and cannot be blown in, and the oxidation efficiency of the absorbing liquid becomes poor. In the latter case, the gas is ejected to the suction side of the blade and the air is decomposed into fine bubbles by the blade.Therefore, if the amount of gas blown is increased, cavitation is likely to occur, so increase the amount of gas blown. I can't.

【0005】そこで、本発明は、このような事情を考慮
してなされたものであり、その目的は、大容量の気体で
も微細な気泡として吹き込ませることができる気体吹込
装置を提供することにある。
Therefore, the present invention has been made in consideration of such circumstances, and an object thereof is to provide a gas blowing device capable of blowing even a large volume of gas as fine bubbles. .

【0006】[0006]

【課題を解決するための手段】本発明は、上記目的を達
成するために、液体に気体を吹き込む装置において、上
記液体中に、回転により液を撹拌する側面式の撹拌翼を
回転自在に設けると共に、この撹拌翼の吐出側に、鉛直
方向下向きに気体を吹き出す吹出口を設けたものである
(請求項1)。その吹出口を、気体が鉛直方向に吹き出
されるように配設することが好ましい(請求項2)。ま
た、吹出口を、上記撹拌翼の回転軸の延長線より下方に
配置することが好ましい(請求項3)。さらに、上記撹
拌翼を、撹拌翼による吐出流が斜め下向きになるように
回転自在に支持することが好ましい(請求項4)。
In order to achieve the above object, the present invention is a device for injecting a gas into a liquid, wherein a side stirring blade for agitating the liquid by rotation is rotatably provided in the liquid. At the same time, the discharge side of the stirring blade is provided with a blowout port for blowing gas downward in the vertical direction (Claim 1). It is preferable that the blowout port is arranged so that the gas is blown out in the vertical direction (claim 2). Further, it is preferable that the blowout port is arranged below an extension of the rotating shaft of the stirring blade (claim 3). Further, it is preferable that the stirring blade is rotatably supported so that the discharge flow from the stirring blade is directed obliquely downward (claim 4).

【0007】[0007]

【作用】撹拌翼が回転すると、液体内に液の流れが生じ
て液が撹拌される。その撹拌翼の吐出側に設けられた吹
出口から気体が下向きに吹き込まれると、気体は撹拌翼
による吐出流により剪断されて微細の気泡となり、これ
が撹拌流に乗って液体中に拡散する。このように、撹拌
翼の吐出側に空気を吹き込むため、吹出口からの空気が
撹拌翼と接触することがないので、大容量の気体を吹き
込んでもキャビテーションを起すことなく気泡を微細化
することが可能となる(請求項1)。
When the stirring blade rotates, a flow of liquid occurs in the liquid and the liquid is stirred. When gas is blown downward from the outlet provided on the discharge side of the stirring blade, the gas is sheared by the discharge flow of the stirring blade to form fine bubbles, which diffuse into the liquid along with the stirring flow. In this way, since air is blown into the discharge side of the stirring blade, air from the outlet does not come into contact with the stirring blade, so even if a large amount of gas is blown in, bubbles can be made fine without causing cavitation. It becomes possible (Claim 1).

【0008】また、吹出口を、気体が鉛直方向に吹き出
されるように配設することにより、気体の微細化を確実
に行える(請求項2)。また、吹出口を、撹拌翼の回転
軸の延長線より下方に配置することにより、吹出口から
の気体が吐出流と確実に接触して気泡は上昇する間に撹
拌流に乗って遠くまで拡散する(請求項3)。
Further, by disposing the air outlet so that the gas is blown out in the vertical direction, it is possible to surely make the gas fine (claim 2). In addition, by arranging the air outlet below the extension line of the rotation axis of the stirring blade, the gas from the air outlet surely comes into contact with the discharge flow and the bubbles rise while riding on the stirring flow while rising. (Claim 3).

【0009】さらに、撹拌翼による吐出流が斜め下向き
になると、気泡を遠くまで導けると共に、吹込管廻りの
液の乱れが抑制されて、気泡の渦と渦に伴う気泡の合体
を防止でき、気泡の合体に伴う粗大化が抑制され均一な
微細気泡とすることができ、液体全体に微細な気泡を分
散することが可能となる(請求項4)。
Further, when the discharge flow by the stirring blade is directed obliquely downward, the bubbles can be guided to a long distance, and the turbulence of the liquid around the blow pipe is suppressed, and the vortex of the bubbles and the coalescence of the bubbles accompanying the vortex can be prevented. The coarsening due to the coalescence is suppressed and uniform fine bubbles can be formed, and the fine bubbles can be dispersed in the entire liquid (claim 4).

【0010】[0010]

【実施例】以下、本発明の一実施例を添付図面に基づい
て詳述する。
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

【0011】本実施例では本発明の気体吹込装置を湿式
の排煙脱硫装置の吸収塔に適用した場合について述べ
る。
In this embodiment, a case where the gas blowing device of the present invention is applied to an absorption tower of a wet type flue gas desulfurization device will be described.

【0012】図1において、1は燃焼機器例えばボイラ
からの排ガスを脱硫処理する円筒状の吸収塔を示し、こ
の吸収塔1の側部下方には排ガスのガス導入口2が設け
られている。
In FIG. 1, reference numeral 1 denotes a cylindrical absorption tower for desulfurizing exhaust gas from a combustion device such as a boiler, and a gas inlet 2 for the exhaust gas is provided below a side portion of the absorption tower 1.

【0013】吸収塔1には、排ガス中の硫黄酸化物の硫
黄分を吸収するための炭酸カルシウム等の吸収剤が溶解
されたスラリ状の吸収液を供給する吸収液供給管3が接
続されていると共に、その内部下方には吸収液を溜める
液溜タンク4が設けられている。また、吸収塔1の液溜
タンク4には、タンク4内の吸収液の一部を循環ポンプ
5により塔1内上方に設けられたスプレーノズル6に移
送する移送管7が接続されており、スプレーノズル6か
ら噴霧された吸収液と塔1内を上昇する排ガスとが向流
接触してガス中の硫黄分が吸収液に吸収除去され、排ガ
スが脱硫処理されるようになっている。
The absorption tower 1 is connected with an absorption liquid supply pipe 3 for supplying a slurry-shaped absorption liquid in which an absorption agent such as calcium carbonate for absorbing the sulfur content of sulfur oxides in exhaust gas is dissolved. In addition, a liquid storage tank 4 for storing the absorbing liquid is provided below the inside thereof. A transfer pipe 7 is connected to the liquid storage tank 4 of the absorption tower 1 to transfer a part of the absorbed liquid in the tank 4 to a spray nozzle 6 provided above the tower 1 by a circulation pump 5, The absorption liquid sprayed from the spray nozzle 6 and the exhaust gas rising in the tower 1 are countercurrently contacted with each other, and the sulfur content in the gas is absorbed and removed by the absorption liquid, so that the exhaust gas is desulfurized.

【0014】さらに、吸収塔1の液溜タンク4内の吸収
液中には、タンク4内の吸収液を回転により吐出流を生
じさせて撹拌するプロペラ状の側面式撹拌翼8が側壁近
傍に回転自在に設けられ、この撹拌翼8がその側壁を貫
通して設けられたモータ9のシャフト10に取り付けら
れて、撹拌機11が構成されている。シャフト10は、
図2に示すように、吸収塔の中心より所定の角度ずれ
て、すなわち撹拌翼8による吐出流によりタンク4内全
体が効率よく撹拌されるように配設されている。
Further, in the absorbing liquid in the liquid storage tank 4 of the absorption tower 1, a propeller-shaped side stirring blade 8 for stirring the absorbing liquid in the tank 4 by rotating to generate a discharge flow is provided near the side wall. The stirring blade 8 is rotatably provided, and the stirring blade 8 is attached to a shaft 10 of a motor 9 provided through the side wall of the stirring blade 8 to form a stirrer 11. The shaft 10 is
As shown in FIG. 2, the tank 4 is arranged so as to be agitated by a predetermined angle from the center of the absorption tower, that is, so that the entire inside of the tank 4 is efficiently agitated by the discharge flow by the agitating blade 8.

【0015】また、液溜タンク4には図1及び図2に示
すように空気吹込管12が接続され、この空気吹込管1
2は吸収液中の撹拌翼8の前方まで延出し、この前方部
は鉛直方向下向きに直管状に形成されると共に、撹拌翼
8の回転軸(シャフト10の軸)の延長線上を通る位置
に配設され、この先端部に鉛直方向下向きに空気を吹き
出す吹出口13が設けられている。
An air blowing pipe 12 is connected to the liquid reservoir 4 as shown in FIGS. 1 and 2, and the air blowing pipe 1
2 extends to the front of the stirring blade 8 in the absorbing liquid, and this front portion is formed in a straight tubular shape in the vertical downward direction, and at a position passing on the extension line of the rotating shaft (axis of the shaft 10) of the stirring blade 8. An air outlet 13 is provided at the tip of the air outlet to blow air downward in the vertical direction.

【0016】空気吹出口13の位置は、図3に示すよう
に、撹拌翼8の回転軸(シャフト10の軸)の延長線よ
り鉛直方向下方に配置することがよく、好ましくは、回
転軸延長線から撹拌翼8の下端延長線までの間がよい。
すなわち、回転軸延長線からの距離をaとすると、a=
0〜d/2(d:撹拌翼の直径)を満足する位置に吹出
口13を位置させる。これは、シャフト10の軸延長線
よりも上であると、撹拌翼8の回転により押し出される
液の流れ(吐出流)にのる(影響される)空気量が少な
いため、空気の拡散が悪くなる。また撹拌翼8の下端延
長線よりも下であると、気泡が微細になり難くいからで
ある。また、吹出口13と撹拌翼8との距離bは、 0.3
d〜dの範囲(d:撹拌翼の直径)内が好ましく、吹出
口13が翼8に近付き過ぎたり離れ過ぎると空気の拡散
が悪くなる。
As shown in FIG. 3, the position of the air outlet 13 is preferably arranged vertically below the extension line of the rotating shaft (axis of the shaft 10) of the stirring blade 8, and preferably the rotating shaft extension. The distance from the line to the extension line of the lower end of the stirring blade 8 is good.
That is, if the distance from the rotation axis extension line is a, then a =
The outlet 13 is located at a position satisfying 0 to d / 2 (d: diameter of the stirring blade). This is because if it is above the axis extension line of the shaft 10, the amount of air carried (affected) by the flow (discharge flow) of the liquid pushed out by the rotation of the stirring blade 8 is small, so that the diffusion of air is poor. Become. Further, if it is below the extension line of the lower end of the stirring blade 8, it is difficult for the bubbles to become fine. In addition, the distance b between the outlet 13 and the stirring blade 8 is 0.3
The range of d to d (d: diameter of the stirring blade) is preferable, and if the air outlet 13 comes too close to or too far from the blade 8, air diffusion becomes poor.

【0017】撹拌翼8の回転軸(シャフト10)を所定
角度傾けて、撹拌翼8による吐出流が斜め下向きになる
ようにすることが好ましく、この角度(空気吹込管(鉛
直部分)12の軸との角度α)は約85〜70°の範囲内に
することがよい。これは、その範囲外であると気泡を効
率よく遠くまで導けなくなるからである。
The rotating shaft (shaft 10) of the stirring blade 8 is preferably tilted at a predetermined angle so that the discharge flow by the stirring blade 8 is directed obliquely downward. This angle (the axis of the air blowing pipe (vertical portion) 12) The angle α) with and is preferably in the range of about 85 to 70 °. This is because the bubbles cannot be efficiently guided to a far distance outside the range.

【0018】次に本実施例の作用を述べる。Next, the operation of this embodiment will be described.

【0019】排ガスは、ガス導入口2から吸収塔1内に
導入され、塔1内を上昇する。この吸収塔1には、炭酸
カルシウム等の吸収剤が溶解されたスラリ状の吸収液が
吸収液供給管3から導入され、液溜タンク4内に溜ま
る。その一部が循環ポンプ5により移送管7を介してス
プレーノズル6に移送され、そのノズル6から塔1内に
噴霧される。この吸収液とガスとが気液接触してガス中
の硫黄酸化物が吸収液に吸収され、被処理ガスが脱硫処
理される。脱硫処理されたガスは、塔1の上部から排出
され他の系に導かれる。脱硫処理後の液は液溜タンク4
に溜まり、タンク4内で酸化処理されて適宜抜き出され
処理される。
The exhaust gas is introduced into the absorption tower 1 through the gas introduction port 2 and rises in the tower 1. A slurry-like absorption liquid in which an absorption agent such as calcium carbonate is dissolved is introduced into the absorption tower 1 through the absorption liquid supply pipe 3 and is accumulated in the liquid storage tank 4. A part thereof is transferred to the spray nozzle 6 via the transfer pipe 7 by the circulation pump 5, and is sprayed from the nozzle 6 into the tower 1. The absorbing liquid and the gas come into gas-liquid contact with each other, the sulfur oxide in the gas is absorbed by the absorbing liquid, and the gas to be treated is desulfurized. The desulfurized gas is discharged from the upper part of the tower 1 and guided to another system. The liquid after desulfurization is the liquid storage tank 4
Accumulated in the tank 4, oxidized in the tank 4 and appropriately extracted and processed.

【0020】液溜タンク4内の撹拌翼8はモータ9によ
り回転駆動される。この撹拌翼8の回転により、その翼
8の背面(吸込側)の液が翼の前方に押し出されて吐出
流が起こり、タンク4内に液の流れが生じて吸収液が撹
拌される。この際、その吐出流はタンク4の中央よりず
れた方向に向いているため、旋回流が起こり、吸収液の
撹拌が効率よく行われる。その撹拌翼8の前方の吐出流
中に設けられた吹出口13から鉛直方向下向きに空気が
吹き込まれる。
The stirring blade 8 in the liquid storage tank 4 is rotationally driven by a motor 9. By the rotation of the stirring blades 8, the liquid on the back surface (suction side) of the blades 8 is pushed forward of the blades to generate a discharge flow, and a liquid flow occurs in the tank 4 to stir the absorbing liquid. At this time, since the discharge flow is directed in a direction deviated from the center of the tank 4, a swirling flow occurs and the absorption liquid is efficiently stirred. Air is blown downward in the vertical direction from an outlet 13 provided in the discharge flow in front of the stirring blade 8.

【0021】このように、吹出口13が吐出流中に位置
されることにより、空気は、吹出口13から下向きに液
体中に出ると吐出流による液の横の流れによって剪断さ
れて微細の気泡となり、これが上昇する間に撹拌流に乗
って液全体に拡散する。このように、撹拌翼の吐出側に
空気を吹き込むため、吹出口13からの空気が直接撹拌
翼8と接触することがないので、大容量の気体を吹き込
んでもキャビテーションを起すことなく気泡を微細化す
ることができる。また、気泡が微細になると、表面積が
大きくなり接触面積が増えるため、吸収液と空気とが十
分接触する。このため、吸収液の酸化反応がよく進み、
空気量を減らすことが可能となる。
Since the outlet 13 is positioned in the discharge flow as described above, when the air is discharged downward from the outlet 13 into the liquid, the air is sheared by the lateral flow of the liquid due to the discharge flow and fine bubbles are formed. While rising, it rides on the stirring flow and diffuses throughout the liquid. In this way, since the air is blown into the discharge side of the stirring blade, the air from the outlet 13 does not come into direct contact with the stirring blade 8. Therefore, even if a large amount of gas is blown, cavitation is made fine without causing cavitation. can do. Further, when the bubbles become fine, the surface area becomes large and the contact area increases, so that the absorbing liquid and the air come into sufficient contact. Therefore, the oxidation reaction of the absorbing solution progresses well,
It is possible to reduce the amount of air.

【0022】さらに、撹拌翼8による吐出流を斜め下向
きにすることで、気泡を遠くまで導くことができると共
に、吹込管12廻りの液の乱れが抑制されて、気泡の渦
と渦に伴う気泡の合体を防止でき、気泡の合体に伴う粗
大化が抑制され均一な微細気泡とすることができる。こ
れによって、均一な微細気泡をより確実に吸収液全体に
分散することができ、酸化反応の促進を図れる。
Further, by making the discharge flow by the stirring blade 8 obliquely downward, the bubbles can be guided to a long distance, and the turbulence of the liquid around the blow-in pipe 12 is suppressed, and the vortices of the bubbles and the bubbles accompanying the vortex are suppressed. Can be prevented, coarsening due to coalescence of bubbles can be suppressed, and uniform fine bubbles can be formed. As a result, uniform fine bubbles can be more surely dispersed throughout the absorbing liquid, and the oxidation reaction can be promoted.

【0023】具体的には、亜硫酸ナトリウム(Na2
3 )を空気で酸化する試験を本発明に係る撹拌機吐出
側空気吹込式(No.3〜No.8)、パイプ吹込式(No.1)及
び撹拌機吸込側空気吹込式(No.2)について行い、その
酸化速度を測定した。その結果は表1に示す。尚、各条
件は下記に示すとおりである。また、撹拌機吐出側空気
吹込式における空気吹出口の位置(a)と撹拌翼による
吐出流の角度(α)は表1に示す6つの場合(No.3〜N
o.8)について行った。
Specifically, sodium sulfite (Na 2 S
The test of oxidizing O 3 ) with air was performed by the agitator discharge side air blow type (No. 3 to No. 8), the pipe blow type (No. 1) and the agitator suction side air blow type (No. 2) was performed and the oxidation rate was measured. The results are shown in Table 1. The conditions are as shown below. In addition, the position (a) of the air outlet and the angle (α) of the discharge flow due to the stirring blade in the air blow-in type of the stirrer for the six cases shown in Table 1 (No. 3 to N)
o.8).

【0024】 試験装置 タンク:φ 800mm×高さ2000mm 液面 :1500mm 撹拌機:撹拌翼のφ 140mm,3枚プロペラ羽根 吹出口と撹拌翼との距離b:60mm 試験条件 空気量:10m3 N/h 温度 :50℃ Na2 SO3 濃度:1%Test device Tank: φ 800 mm × height 2000 mm Liquid level: 1500 mm Stirrer: φ 140 mm of stirring blade, 3 propeller blades Distance between outlet and stirring blade b: 60 mm Test condition Air volume: 10 m 3 N / h Temperature: 50 ° C Na 2 SO 3 concentration: 1%

【0025】[0025]

【表1】 [Table 1]

【0026】表1に示した結果からも明らかなように、
撹拌機吐出側空気吹込式(No.3〜No.8)において空気吹
出口の位置が撹拌翼の回転軸延長線以下ではパイプ吹込
式(No.1)より酸化速度が速い。空気吹出口が回転軸延
長線上及び撹拌翼の下端延長線より下方に位置(a>7
0)された場合(No.8)には、撹拌機吸込側空気吹込式
(No.2)と同じかやや劣る酸化速度であった。空気吹出
口が回転軸延長線と撹拌翼下端延長線との間に位置され
る(0<a<70)と、酸化速度は撹拌機吸込側空気吹込
式(No.2)より速くなり、しかも吐出流の角度を傾斜さ
せた場合には酸化速度が特に速くなる。従って、空気吹
出口を回転軸延長線と撹拌翼下端延長線との間に位置さ
せることにより、酸化速度の促進を図れ、しかもこの場
合、撹拌翼による吐出流を所定の角度下向きにすること
で、一層酸化速度を速くすることができる。
As is clear from the results shown in Table 1,
In the agitator discharge side air blow type (No.3 to No.8), the oxidation rate is faster than that of the pipe blow type (No.1) when the position of the air outlet is below the extension line of the rotation axis of the stirring blade. The air outlet is located on the extension line of the rotating shaft and below the extension line of the lower end of the stirring blade (a> 7
In the case of (0) (No. 8), the oxidation rate was the same as or slightly inferior to that of the agitator suction side air blowing type (No. 2). When the air outlet is located between the rotary shaft extension line and the stirring blade lower end extension line (0 <a <70), the oxidation rate becomes faster than that of the agitator suction side air blowing type (No.2). When the angle of the discharge flow is inclined, the oxidation rate becomes particularly high. Therefore, by locating the air outlet between the rotation axis extension line and the stirring blade lower end extension line, the oxidation rate can be promoted, and in this case, the discharge flow by the stirring blade is directed downward by a predetermined angle. The oxidation rate can be further increased.

【0027】[0027]

【発明の効果】以上要するに本発明によれば、以下のよ
うな優れた効果を奏する。
In summary, according to the present invention, the following excellent effects are obtained.

【0028】(1)請求項1の構成によれば、大容量の気
体でも微細な気泡として液体に吹き込ませることができ
る。
(1) According to the structure of claim 1, even a large volume of gas can be blown into the liquid as fine bubbles.

【0029】(2)請求項2の構成によれば、気体の微細
化を確実に行える。
(2) According to the structure of claim 2, the atomization of the gas can be surely performed.

【0030】(3)請求項3の構成によれば、気泡の拡散
を確実に行える。
(3) According to the configuration of claim 3, the bubbles can be surely diffused.

【0031】(4)請求項4の構成によれば、気泡の合体
に伴う粗大化が抑制され均一な微細気泡とすることがで
き、液体全体に微細な気泡を分散することできる。
(4) According to the configuration of claim 4, coarsening due to coalescence of bubbles can be suppressed to form uniform fine bubbles, and fine bubbles can be dispersed throughout the liquid.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.

【図2】図1中のA−A線矢視図である。FIG. 2 is a view taken along the line AA in FIG.

【図3】本発明の吹出口の位置及び撹拌翼の取付状態を
説明するための図である。
FIG. 3 is a diagram for explaining the position of the outlet and the mounting state of the stirring blade of the present invention.

【符号の説明】[Explanation of symbols]

8 撹拌翼 13 吹出口 8 Stirrer 13 Outlet

フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B01F 3/04 A 7/02 A 0821−4D B01J 10/00 104 0821−4D B01D 53/34 125 Q Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI Technical display location B01F 3/04 A 7/02 A 0821-4D B01J 10/00 104 0821-4D B01D 53/34 125 Q

Claims (4)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 液体に気体を吹き込む装置において、上
    記液体中に、回転により液を撹拌する側面式の撹拌翼を
    回転自在に設けると共に、該撹拌翼の吐出側に、下向き
    に気体を吹き出す吹出口を設けたことを特徴とする気体
    吹込装置。
    1. A device for blowing gas into a liquid, wherein a lateral stirring blade that stirs the liquid by rotation is rotatably provided in the liquid, and the gas is blown downward to the discharge side of the stirring blade. A gas blowing device having an outlet.
  2. 【請求項2】 上記吹出口を、気体が鉛直方向に吹き出
    されるように配設した請求項1記載の気体吹込装置。
    2. The gas blowing device according to claim 1, wherein the air outlet is arranged so that gas is blown out in a vertical direction.
  3. 【請求項3】 上記吹出口を、上記撹拌翼の回転軸の延
    長線より下方に配置した請求項1又は2記載の気体吹込
    装置。
    3. The gas blowing device according to claim 1, wherein the blowout port is arranged below an extension line of the rotating shaft of the stirring blade.
  4. 【請求項4】 上記撹拌翼を、撹拌翼による吐出流が斜
    め下向きになるように回転自在に支持した請求項1乃至
    3のいずれかに記載の気体吹込装置。
    4. The gas blowing device according to claim 1, wherein the stirring blade is rotatably supported so that a discharge flow from the stirring blade is directed obliquely downward.
JP13544094A 1994-06-17 1994-06-17 Gas injection device Expired - Fee Related JP3381389B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13544094A JP3381389B2 (en) 1994-06-17 1994-06-17 Gas injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13544094A JP3381389B2 (en) 1994-06-17 1994-06-17 Gas injection device

Publications (2)

Publication Number Publication Date
JPH08949A true JPH08949A (en) 1996-01-09
JP3381389B2 JP3381389B2 (en) 2003-02-24

Family

ID=15151775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13544094A Expired - Fee Related JP3381389B2 (en) 1994-06-17 1994-06-17 Gas injection device

Country Status (1)

Country Link
JP (1) JP3381389B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007066443A1 (en) 2005-12-07 2007-06-14 Babcock-Hitachi Kabushiki Kaisha Wet flue-gas desulfurization apparatus and method of wet flue-gas desulfurization
JP2008068161A (en) * 2006-09-12 2008-03-27 Babcock Hitachi Kk Wet fuel gas desulfurizer
US7666350B2 (en) 2003-12-01 2010-02-23 Kabushiki Kaisha Kobe Seiko Sho Low carbon composite free-cutting steel product excellent in roughness of finished surface and method for production thereof
JP2011041941A (en) * 2009-08-21 2011-03-03 Alstom Technology Ltd Apparatus and method of washing flue gas

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7666350B2 (en) 2003-12-01 2010-02-23 Kabushiki Kaisha Kobe Seiko Sho Low carbon composite free-cutting steel product excellent in roughness of finished surface and method for production thereof
WO2007066443A1 (en) 2005-12-07 2007-06-14 Babcock-Hitachi Kabushiki Kaisha Wet flue-gas desulfurization apparatus and method of wet flue-gas desulfurization
JP4776630B2 (en) * 2005-12-07 2011-09-21 バブコック日立株式会社 Wet flue gas desulfurization apparatus and wet flue gas desulfurization method
US7731926B2 (en) 2005-12-07 2010-06-08 Babcock-Hitachi Kabushiki Kaisha Wet flue-gas desulfurization apparatus and method of wet flue-gas desulfurization
AU2006322822B2 (en) * 2005-12-07 2010-07-15 Mitsubishi Hitachi Power Systems, Ltd. Wet flue-gas desulfurization apparatus and method of wet flue-gas desulfurization
JP2008068161A (en) * 2006-09-12 2008-03-27 Babcock Hitachi Kk Wet fuel gas desulfurizer
JP2011041941A (en) * 2009-08-21 2011-03-03 Alstom Technology Ltd Apparatus and method of washing flue gas
CN101992016A (en) * 2009-08-21 2011-03-30 阿尔斯托姆科技有限公司 System and method for flue gas scrubbing
EP2286895A3 (en) * 2009-08-21 2012-08-15 Alstom Technology Ltd System and method for flue gas scrubbing
US8657925B2 (en) 2009-08-21 2014-02-25 Alstom Technology Ltd Method for flue gas scrubbing

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